package servlet;

import db.DB;
import model.purchase_list_goods;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/addplistgood")//访问的时候给一个地址,高于3.0版本的包才能这么配地址
public class addplistgood extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setHeader("content-type","text/html;charset=utf-8");
        int plistid=Integer.parseInt(req.getParameter("addplistgood"));
        int goodid=Integer.parseInt(req.getParameter("addplistgoodname"));
        int amount=Integer.parseInt(req.getParameter("addplistgoodamount"));


        purchase_list_goods plg=new purchase_list_goods();
        plg.setPurchase_List_id(plistid);
        plg.setGoods_id(goodid);
        plg.setPurchase_quantity(amount);


        HttpSession session=req.getSession();

        if(new DB().addplistgood(plg)){
            new DB().changestock(goodid,amount);//添加订单同时修改库存
            new DB().updateplist(plistid);//同时更新订单价格
        }
        else{
            String message = "添加失败！可能原因：商品已存在";
            session.setAttribute("message",message);
        }
        if(Integer.parseInt(req.getParameter("whichpage"))==2){
            session.setAttribute("buypage","showlist2");
        }
        else{
            session.setAttribute("buypage","createlist2");
        }
        resp.sendRedirect("buysystem.jsp");

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp); }
}

